#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
	const double pi = 3.14159;
	double r, d, len, area;
	cin >> r;
	d = 2.0 * r;
	len = pi * d;
	area = pi * r * r;
	printf("%.4lf %.4lf %.4lf\n", d, len, area);
	return 0;
}
